Convertible Preferred Stock and Stock Warrants	3 Months Ended
Mar. 31, 2014
Warrants and Rights Note Disclosure [Abstract]
Convertible Preferred Stock and Stock Warrants	Convertible Preferred Stock and Stock Warrants In August 2009, the Company sold 16,000 units (the “Units”), consisting of preferred stock and warrants for $1,000 per Unit. Each Unit consisted of one share of Series A cumulative convertible preferred stock (“Convertible Preferred Stock”), detachable warrants to purchase up to 155 shares of the Company's common stock at an exercise price of $2.31 per share (“Exercisable Warrants”) and detachable contingent warrants to purchase up to 500 shares of the Company's common stock at an exercise price of $2.45 per share (“Contingent Warrants”). Preferred Stock Each share of Convertible Preferred Stock was convertible at any time, at the holder’s option, into 434.782 shares of the Company’s common stock. The conversion rate represented an equivalent conversion price of approximately $2.30 per share of common stock. Each share of Convertible Preferred Stock had a liquidation preference of $1,000. Dividends accrued at a rate of 15% of the liquidation preference per year and accumulated, if not paid quarterly. Subsequent to February 11, 2010, the Company had the ability to convert the preferred shares into common shares if the closing price of the common stock met certain price criteria. In the event any Convertible Preferred Stock was converted, the Company was obligated to pay an amount, in cash or common stock, equal to eight quarterly dividend payments less any dividends previously paid. In February 2011, the Company exercised its contractual right to mandatorily convert all outstanding shares of Convertible Preferred Stock into shares of common stock at the prevailing conversion rate of 434.782 shares of common stock for each share of preferred stock. Currently, the Company has no issued or outstanding shares of preferred stock. Stock Warrants Exercisable Warrants were exercisable upon issuance and expire August 12, 2014, if not exercised. Contingent Warrants became exercisable on November 9, 2009, and expire November 9, 2014, if not exercised. Prior to June 14, 2012, the warrants contained anti-dilution price protection in the event the Company issued shares of common stock or securities exercisable for, or convertible into, common stock at a price per share less than the warrants’ exercise price. In accordance with these contractual anti-dilution price adjustment provisions, the warrants were re-priced as a result of a payment of a portion of the initial and deferred commitment fees related to the Company’s term loan with common stock on March 31, 2010 and September 30, 2010. Due to the anti-dilution price adjustment provisions established at the issuance date, the warrants were deemed to be a liability and were recorded at fair value at the date of issuance. The warrant liability was adjusted to fair value at the end of each reporting period through the statement of operations during the period the anti-dilution price adjustment provisions were in effect. On June 14, 2012, contractual provisions within the Company’s Exercisable and Contingent Warrant agreements were modified to eliminate the anti-dilution price adjustment provisions of the warrants and remove the cash settlement provisions in the event of a change of control. The amended warrants then qualified to be classified as equity. Accordingly, the Company revalued the warrants as of June 14, 2012, the date of contractual amendment. The change in fair value of the warrant liability compared to the fair value on December 31, 2011, $2.6 million, was recognized in income during 2012. The revalued warrant liability of $14.0 million was reclassified to additional-paid-in-capital on June 14, 2012. There were no longer fair value adjustments because the warrants continued to meet the criteria for equity classification. The Company used the Black-Scholes option-pricing model to estimate the fair value of the warrant liability for each reporting period. On June 14, 2012, the date the warrants were amended, inputs into the fair value calculation included the actual remaining term of the warrants, a volatility rate of 58.1%, a risk-free rate of return of 0.36%, and an assumed dividend rate of zero. On February 7, 2014, warrants were exercised to purchase 1,277,250 shares of the Company's common stock at $1.21 per share. The Company received cash proceeds of $1.5 million in connection with the warrants exercised. Following the exercise, the Company no longer had any outstanding warrants from its sale of preferred stock and warrants in August 2009.

Convertible Preferred Stock and Stock Warrants

In August 2009, the Company sold 16,000 units (the “Units”), consisting of preferred stock and warrants for $1,000 per Unit. Each Unit consisted of one share of Series A cumulative convertible preferred stock (“Convertible Preferred Stock”), detachable warrants to purchase up to 155 shares of the Company's common stock at an exercise price of $2.31 per share (“Exercisable Warrants”) and detachable contingent warrants to purchase up to 500 shares of the Company's common stock at an exercise price of $2.45 per share (“Contingent Warrants”).

Preferred Stock

Each share of Convertible Preferred Stock was convertible at any time, at the holder’s option, into 434.782 shares of the Company’s common stock. The conversion rate represented an equivalent conversion price of approximately $2.30 per share of common stock.

Each share of Convertible Preferred Stock had a liquidation preference of $1,000. Dividends accrued at a rate of 15% of the liquidation preference per year and accumulated, if not paid quarterly. Subsequent to February 11, 2010, the Company had the ability to convert the preferred shares into common shares if the closing price of the common stock met certain price criteria. In the event any Convertible Preferred Stock was converted, the Company was obligated to pay an amount, in cash or common stock, equal to eight quarterly dividend payments less any dividends previously paid.

In February 2011, the Company exercised its contractual right to mandatorily convert all outstanding shares of Convertible Preferred Stock into shares of common stock at the prevailing conversion rate of 434.782 shares of common stock for each share of preferred stock. Currently, the Company has no issued or outstanding shares of preferred stock.

Stock Warrants

Exercisable Warrants were exercisable upon issuance and expire August 12, 2014, if not exercised. Contingent Warrants became exercisable on November 9, 2009, and expire November 9, 2014, if not exercised. Prior to June 14, 2012, the warrants contained anti-dilution price protection in the event the Company issued shares of common stock or securities exercisable for, or convertible into, common stock at a price per share less than the warrants’ exercise price. In accordance with these contractual anti-dilution price adjustment provisions, the warrants were re-priced as a result of a payment of a portion of the initial and deferred commitment fees related to the Company’s term loan with common stock on March 31, 2010 and September 30, 2010.

Due to the anti-dilution price adjustment provisions established at the issuance date, the warrants were deemed to be a liability and were recorded at fair value at the date of issuance. The warrant liability was adjusted to fair value at the end of each reporting period through the statement of operations during the period the anti-dilution price adjustment provisions were in effect. On June 14, 2012, contractual provisions within the Company’s Exercisable and Contingent Warrant agreements were modified to eliminate the anti-dilution price adjustment provisions of the warrants and remove the cash settlement provisions in the event of a change of control. The amended warrants then qualified to be classified as equity. Accordingly, the Company revalued the warrants as of June 14, 2012, the date of contractual amendment. The change in fair value of the warrant liability compared to the fair value on December 31, 2011, $2.6 million, was recognized in income during 2012. The revalued warrant liability of $14.0 million was reclassified to additional-paid-in-capital on June 14, 2012. There were no longer fair value adjustments because the warrants continued to meet the criteria for equity classification.

The Company used the Black-Scholes option-pricing model to estimate the fair value of the warrant liability for each reporting period. On June 14, 2012, the date the warrants were amended, inputs into the fair value calculation included the actual remaining term of the warrants, a volatility rate of 58.1%, a risk-free rate of return of 0.36%, and an assumed dividend rate of zero.

On February 7, 2014, warrants were exercised to purchase 1,277,250 shares of the Company's common stock at $1.21 per share. The Company received cash proceeds of $1.5 million in connection with the warrants exercised. Following the exercise, the Company no longer had any outstanding warrants from its sale of preferred stock and warrants in August 2009.